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logs, and then later commits that data to the Exchange databases. Exchange transaction logs are also used in the disaster recovery process should an Exchange database fail.

Since the transaction logs are an important part of the Exchange Server disaster recovery process, it stands to reason that they need to be on a separate disk from the Exchange databases. Keeping the Exchange transaction logs separate from the databases is important from a performance standpoint, too.

Since all of the Exchange databases within an Exchange storage group share a common set of transaction log files, you need one dedicated volume per storage group for storing Exchange transaction logs.

Furthermore, Exchange Server writes transaction logs in a linear fashion, so although a RAID array is recommended, you can get away with a RAID 1 array without sacrificing performance. Microsoft does recommend that the RAID 1 array be SAN-based though.

To move a set of Exchange Server transaction logs:

Open Exchange System Manager and navigate to Administrative Groups -> your administrative group -> Servers -> your server -> the storage group for which you want to move the transaction logs.

Right click on the Exchange storage group and select Properties.

Click the Browse button next to the Transaction Log Location field and select a new location

Brien M. Posey, MCSEBrien M. Posey, MCSE, is a Microsoft Most Valuable Professional for his work with Exchange Server, and has previously received Microsoft's MVP award for Windows Server and Internet Information Server (IIS). Brien has served as CIO for a nationwide chain of hospitals and was once responsible for the Department of Information Management at Fort Knox. As a freelance technical writer, Brien has written for Microsoft, TechTarget, CNET, ZDNet, MSD2D, Relevant Technologies and other technology companies. You can visit Brien's personal Web site at http://www.brienposey.com.

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